Due Oct 1in 3 months
Both of you
Knowing what leave you qualify for is not the same as formally telling your employer, and the telling has its own clock: FMLA requires 30 days' advance notice for foreseeable leave. This task is the written notice, the forms, and written confirmation of your dates and pay.
There is a step between "I know what leave I can take" and "my leave is actually approved," and it trips up a surprising number of well-prepared parents. Let's walk it from zero.
What this task actually is. By now, your earlier tasks helped you figure out what you're eligible for: FMLA (the federal law that can protect your job during leave), state programs, your employer's own parental leave policy, PTO, or some combination. This task is the act itself: formally notifying your employer, in writing, that you are taking leave. Eligibility is a fact about you; notice is a thing you do. Benefits and protections generally do not activate themselves, they get activated by this notification.
Why the timing is not optional. The formal notification runs on its own clock, separate from everything else: FMLA requires 30 days' advance notice for foreseeable leave, and a due date is about as foreseeable as life events get. Many employer and state programs have their own notice rules on top of that. This is the reason the task sits where it does on your timeline: late notice can legally jeopardize job protection under FMLA and delay income-replacement benefits. Stated once, calmly: the notice date is real, and it is also easy to beat by simply doing this now.
Why "in writing" is doing so much work here. A hallway conversation with a manager is not notice in any way you can later point to. An email is: it has a date, a recipient, and your stated intentions, and it starts the official clock. The email template attached gives you a clean written-notice starting point; adjust names and dates and send it to HR, not only to your direct manager, since HR runs the machinery of forms and approvals.
What happens after you hit send. Expect paperwork, and think of each piece as switching something on. Depending on your situation there may be an FMLA certification (the form your employer uses to formally designate your leave as FMLA-protected), disability claim forms (for income during the birth parent's recovery period, where such a program applies), and a company leave request (your employer's internal form). Ask HR which of these apply to you, get them, complete them, and submit them with time to spare.
The finish line is written confirmation. The task is not done when the forms go in. It is done when you have, in writing, your approved leave dates and how your pay will work during leave: what pay arrives when, and from which source. This is the difference between believing you're covered and knowing you are, and it turns your household budget during leave from a guess into a number. If confirmation doesn't come, one polite follow-up email referencing your original notice usually shakes it loose.
One per parent. Each working parent does this with their own employer. Eligibility, policies, forms, and dates are all independent between the two employers, so this is genuinely two parallel tasks, not one shared one.
Worth clearing up now, while it's cheap:
Late notice can legally jeopardize job protection under FMLA and delay income-replacement benefits.
Mothers Plan provides information and organization, not legal, tax, financial, or medical advice.